ENGINE (DIAGNOSTICS)(H4DOTC DIESEL) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

• Hard to start

• White smoke emitted when engine is cold.

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode and Inspection Mode .

WIRING DIAGRAM:

STEP	CHECK	YES	NO
1.CHECK POOR CONTACT. Check for poor contact in ECM connector, main fuse box connector and glow relay connector.	Is there poor contact in ECM connector, main fuse box connector or glow relay connector?	Repair the poor contact of the ECM connector, main fuse box connector or glow relay connector.
2.CHECK HARNESS BETWEEN GLOW RELAY CONNECTOR AND GLOW PLUG CONNECTOR. 1) Turn the ignition switch to OFF. 2) Remove the glow relay. 3) Disconnect the connectors from ECM and all glow plugs. 4) Measure the resistance between glow relay connector and engine ground. Connector & terminal (F9) No. 9 — Engine ground:	Is the resistance 1 MΩ or more?		In this case, repair or replace the following item: • Short circuit to ground in harness between glow relay connector and glow plug connector • Short circuit to ground in harness between ECM connector and glow relay connector • Blown out of glow fuse
3.CHECK HARNESS BETWEEN ECM AND GLOW RELAY CONNECTOR. Measure the resistance between ECM connector and chassis ground. Connector & terminal (B134) No. 34 — Chassis ground: (B134) No. 73 — Chassis ground:	Is the resistance 1 MΩ or more?		In this case, repair or replace the following item: • Short circuit to ground in harness between ECM connector and glow relay connector • Blown out of fuse (relay block)
4.CHECK HARNESS BETWEEN ECM AND GLOW RELAY CONNECTOR. Measure the resistance of harness between ECM connector and glow relay connector. Connector & terminal (B134) No. 34 — (F9) No. 10: (B134) No. 73 — (F9) No. 9:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between ECM connector and glow relay connector.
5.CHECK HARNESS BETWEEN GLOW RELAY CONNECTOR AND ENGINE GROUND. Measure the resistance of harness between glow relay connector and engine ground. Connector & terminal (F9) No. 11 — Engine ground:	Is the resistance less than 1 Ω?		Repair the open circuit in harness between glow relay connector and chassis ground.
6.CHECK GLOW PLUG. Check all glow plugs.	Are all glow plugs normal?	Replace the glow relay.	Replace the faulty glow plug.